Continuous grating structure



Oct. 29,- 1929. E L- PRICE l 1,733,903

i CONTINUOUS GRATING STRUCTURE Original Filed June 21. 1928 f/"N A@ ""5 6" .2-

. v y v A "y y Y v INVENToR Pau! L. Przce BY? Q v:

ATTORN EY Patented' Oct. j

' llmar-raus'rarlszs PATENT OFFICE PAUL LEON PRIQE, 0F IOUNTV'RNON, NEW YORK, ASSIGNOR TO IRVING IRON WORKS COMPANY, ACORRORATION 0F NEW YORK ooN'rrNUoUs Gnarme STRUCTURE Application Med Jfune 21,1928, Serial No. 287,282. Renewed September 8,1929.

This invention relates to metal structures which may serve as ventilated loorings, runways and similar' structures, and also as metal reenforcements for all kinds of concrete structures. It consists essentiall of a simple form of-interlockin joint by w ich standardized panel units o grating, each comprising a pluralityof straight bars and' intervening ent strlps connecting and spacing apartsaid bars, may be convenlently and easily bolted, pinned or spot-welded together on the job so. as to produce a built-u structure of indefinite length. and of su stantially. uniform imesh throughout, the 'oints in which structure shall present nearly the same resistance -ito both longitudinal and bending4 stresses as do the main bodies of the component panels themselves.

In substance it'presents another. embodiment of the general idea described and more broadly claimedin my co ending applicationl Serial No. 287,291, i ed ofeven date herewith, and is distinguished from the spe- 'icic embodiment thereof illustrated in said copending application in that the present invention is more easily applicable to gratings in which the straight bars and bent strips are all of the same depth.

The best form of .apparatus at vpresent known to me embodying my inventionpis illustrated in the accompanying sheet of drawings in which Fig. 1 is a plan view of the interlocking, abutting ends of two panels of grating connected together to form a. joint in accordance withmy present invention, the outer ends of each panel being broken` away.

Fig. 2 is a cross section on line 2-2 of Fig. 1, and

Fig. 3 is a perspective detail view of the ends of two straight bars and two bent strips in the relative position they would occupy in forming a joint, but separated laterally for clearness.

Throughout the drawings like reference characters indicate like parts. 1, 3, 5 and 7 represent portions of the parallel straight bars in the right hand panel. 12,4 and 6 represent intervening bent strips fastened to the 16 portions of the intervening bent strips which, together with the straight bars, form such lefthand panel. Preferably the left hand ends of the straight bars of each panel, as indicated at 1, 3, 15'* and 7", are laterally off'- set at 1, 3, 5c and 7 c, a distance substantially equal to the thickness of the main `body of the bar, and which offset portions are of a length slightly greater than the length of a single mesh of the grating. The said offset portions-of the straight bars (with the exception of the outer bar 1 of each panel which would form the outer edge of an entire iloor or runway) have notches' such as 5" and 7* (see Figs. 2 and 3) .cut preferably in their lower edges of a si'zeand shape to receive the'hook around 'the partly cut away end portions, as 12", 14" of the bent strips of the next panel to the left, as shown in Figs. 2 and 3. As indicated in Fig. 3, in forming each element joint an offset portion, as 3 of'bar 3,

overlaps the end of a straight bar, as 13, and

the end of a bent strip, las 2, of one panel `overlaps the cutaway end, as-12", of a bent .strip of the next panel, all being pinned together by one of the split pins 10, ywhich passes through holes 10", 10y and 10, punched respectively in 2, 12b and 13, and in other corresponding elements. Such a pin is shown in cross section in. Fig. 2, where a corresponding end 14 of a bent strip-is shown nested in a notch 5 in extension 5 of a straight bar 5.

The straight bars are all of the same length, but thev consecutive bars are staggered longitudinally with reference one to another by a distance substantially equal to half of the grating mesh. The bent strips are also all of equal length, such length,'however, being less than the length of the straight barsby a distance-equal approximately to the length of a grating mesh. Each bent strip on one side'of an adjacent straight bar is so located with reference to that straight bar that said straight bar projects beyond each end of said bent strip by a distance approximately equal to one half agrating mesh. Thus in Fig. 1, the straight bar 15 is shown rojecting beyond the correspondin end of the bent strip 14 by one-half a mesh ength and the straight bar 5 portion, marked 5, 'which would be a continuation of the part marked 15 in any unit panel, projects one half a mesh length beyond the left hand end of the bent strip portion 4, wwhich' in any panel unit would be a continuation of the part marked 14. Similarly each straight bar, as 5`-15, has its lefthand end in the'same transverse line as the lefthand end of thebent strip 6--16 which ison its other side, while its right hand end projects, as shown in Fig. 1, a distance of a whole mesh length beyond the right hand end of the bent strip 6'-16.

Also all the bent strips,las 2-12, 4:'-14, o each unit panel are' staggered longitudinally a 2o distance of one half mesh with reference one,

to another.

Those portions 1, 3*, 5*, 11, 13, &c, which project beyond the ends of the bent strips, and the ends 2, 4, 14, &c. of all the bent strips,

are all left free from fastening means when the panel is manufactured in the shop, but have registering holes 9, 10", 1()y or 10z punched through them at standard rivet positions, as indicated in Fig. 3.

Preferably the right hand end of each bent stri is so cut away as to make the remaining projectin section (as 12" or 14", see Figs. 2 and 3) o a width equal to'onevhalf the uniform depths of all bars and strips, and the notches (as 3") in the straight bar offsetportions are of similar half depth to receive said projecting sections.

To increase the resistance of the `oint to transverse bending strains, the overlapping portions of the straight bars, as 1*, 11, 3*, 13", &c.` will be bolted or inned together at 9, 9, as ,shown in Fig. 1. he end portions of all straight bars having been punched in the shop, as indicated at 9l in Fig. 3, can receive such fastening means 9, when theyl are overlapped to form a joint, shown in Fig. 1.

. It is evident that the joint between an two abutting panels of grating thus forme will present nearly as great a resistance to longitudinal strains tending to pull them apart,

as do the main bodies of the panels themselves,

- that the straight bars of any two panels being oined together by the long splices at 9,'9,

renderedA pai"ticularly eil'ective' by the inter-v' lockmg actionf'the notches 3", 5*, &.c. in the straight around the joints r and said splices being staggered in consecutive tween the surrounding other portions of the grating which are held together by fastening means 10.

-It is 4evident, also, that various changes could be made in the details ofthe structure illustrated and above described without departin from the underlying principles of the lnvention aboveset out generically. Other forms of grating mesh could be substituted, the extent of-overlap between straight bars or between bent strips or both, might be varied from that shown in the drawin The desired overlapping of theends o the straight bars might be attained without the specific short bent offset :such as is shown at 1, 3, &c. and other minor details of conformation of the elements, or location of fastening means, made as might be desirable in-any particular case. v

It is equally evidentthat by the use of my invention an unlimited number of reasonably short standard panel units of grating such as would be presented by joining together the broken away ends -of the panel sections shown in Figs. 1 and 2, can be cheaply manufactured by quantity production in the shop and then, after trans `ortation to the place of use, can be quickly astened together without the use of means other than simple bolts or cotter pins or spotwelding apparatus tures which will present substantially all the advantages which might result from the building of such continuous loorings, &c. by uniting on the job bars andv strips of very to form continuous floorings or other struowidth, the constituent strips of flooring structure formed by the use of my invention i may beunited side by side with the joints in said respective strips staggered with reference one to another, the general arrangesimilar to those lly described in Patent No.

plicationof W. A. anvHoffen.

los

.ments of these 'oints and fastenings being Having described my invention,.I claim:

1. In a continuous 'grating structure thef combination of a series of panels of grating clamped together end to end, each panel com prising. 'a plurality of straight bars ofnniform depth held together, lbut spaced apart, by interveningbent strips of* an equal uniform depth fastened to them at spaced apart points, certain of the extremities ofthe bent strips,` at one end of each panel being cut away toleave projecting portions of less than the full depth, the straight bars von the abutting-` end of the next panel being notched to engage and h ookaround said projecting portions pf the bent strips of thejrstpanel, and

sind,interlockingl portions .being ,pinned together when the adi acent ends of the panels are interleaved 'form a connecting joint by connecting means passing through the pro- Y jeotirg portion of said bent stri ends.

of the bars and strips.

3. A combination such as defined in claim 1 in which the depth of the notches in the straight bars, and projecting portions of the bent strips, are each of one half the depth of the main body of the grating.

4, A combination such as de ned in claim 1 in which the straight bars are considerabl longer than .the bent strips and have their resultant overlapping portions held together by additional clamping means.

5. As a new article'oof manufacture a panel i of grating adapted for use as a standardized unit for built-up' grating structures of any desired length. which panel com rises a series of parallel bars o uniform ength and depth, held together but spaced apart by intervenin' bent stripsof the same depth and of a uni orm but lesser length, the ends of each of said straight bars projecting substantially at equal'distances beyond the ends of a bent strip adjacent one side thereof, theprojecting portions of the straight bars at one end of the panel being notched, and the ends of the bent strips at the other end of the panel being partly cut away, the shape and location of said notches and of the uncutaway portions of the bent strips being similar one to another; whereby, on assembling a series of such panels to form a continuous gratln'g, the uncutawa portions of the bent strips 1n any one pane may be nested in the notches cut in the straight bars lof the next panel abutting that end.

6. A panel of grating such as definedin claim 5 in which said notches are located inthe under edges of the straight bars.

7. A panel of grating such as defined in claim 5 in which said notches and projecting, uncutaway portions of bent strip ends are all of one half the depth of the main body of the grating panel.

8. As a new article of manufacture a panel of grating'adapted for use as a standardized unit for built-up grating structures of any desired length, which panel comprises a series of parallel bars of uniform length and depth, held together but spaced apart by intervening bent strips of the same depth and of a uniform but lesser length, the ends of each said straight bars and bent strips being free from permanent fastening means one to another, the unfastened portions of the straight bars at one end of the panel being notched, and the ends of the bent strips at the other end o the panel being partly cut away, the shape and location of said notches and of the uncntaway portions of the bent strips being similar one to another; whereby, 0n assemsuch panels to form a conthe uncutaway portions of combination such as de ed in claim the bent strips 1n any one panel ma 1 in which said notches and rojecting exin the notches cut 1n the straight tremities are all located along t e lower edges next bling a series of tinuous grating,

Panel sbuttinAUL LEON PRICE llos 

